The leasing of any habitation which, at the beginning of the tenancy, is unsafe or unsanitary due to violations of this subtitle in that habitation or in the common space of the premises (whether or not those violations are the subject of a notice issued under this subtitle) of which the owner has knowledge or reasonably should have knowledge, shall render void the lease or rental agreement for the habitation.
After the beginning of the tenancy, if the habitation becomes unsafe or unsanitary due to violations of this subtitle in that habitation or in the common space of the premises (whether or not the violations are the subject of a notice issued under this subtitle), the lease or rental agreement for the habitation shall be rendered void if both of the following apply:
D.C. Mun. Regs. tit. 14, r. 14-302